Be ready for a totally different experience, and be willing to just go with the flow.
If you can adjust to operating with little info and changing priorities very frequently, you'll do just fine.
Hopefully you'll get lots of skills practice - IVs, foleys, respiratory treatments, etc.
Read up on your cardiac, respiratory, & GI/GU info & meds -- chest pain, shortness of breath & abdominal pain account for many
Welcome to the ER: I hope you have a great experience!